GHSA-5v2h-r2cx-5xgj

Suggest an improvement
Source
https://github.com/advisories/GHSA-5v2h-r2cx-5xgj
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/01/GHSA-5v2h-r2cx-5xgj/GHSA-5v2h-r2cx-5xgj.json
JSON Data
https://api.test.osv.dev/v1/vulns/GHSA-5v2h-r2cx-5xgj
Aliases
Published
2022-01-14T21:04:46Z
Modified
2023-11-01T04:57:41.018173Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Inefficient Regular Expression Complexity in marked
Details

Impact

What kind of vulnerability is it?

Denial of service.

The regular expression inline.reflinkSearch may cause catastrophic backtracking against some strings. PoC is the following.

import * as marked from 'marked';

console.log(marked.parse(`[x]: x

\\[\\](\\[\\](\\[\\](\\[\\](\\[\\](\\[\\](\\[\\](\\[\\](\\[\\](\\[\\](\\[\\](\\[\\](\\[\\](\\[\\](\\[\\](\\[\\](\\[\\](\\[\\](\\[\\](\\[\\](\\[\\](\\[\\](\\[\\](\\[\\](\\[\\](\\[\\](\\[\\](\\[\\](\\[\\](\\[\\](`));

Who is impacted?

Anyone who runs untrusted markdown through marked and does not use a worker with a time limit.

Patches

Has the problem been patched?

Yes

What versions should users upgrade to?

4.0.10

Workarounds

Is there a way for users to fix or remediate the vulnerability without upgrading?

Do not run untrusted markdown through marked or run marked on a worker thread and set a reasonable time limit to prevent draining resources.

References

Are there any links users can visit to find out more?

  • https://marked.js.org/using_advanced#workers
  • https://owasp.org/www-community/attacks/RegularexpressionDenialofService-ReDoS

For more information

If you have any questions or comments about this advisory:

Database specific 
{
    "nvd_published_at": "2022-01-14T17:15:00Z",
    "cwe_ids": [
        "CWE-1333"
    ],
    "severity": "HIGH",
    "github_reviewed": true,
    "github_reviewed_at": "2022-01-14T19:57:17Z"
}
References

Affected packages

npm / marked

Package

Name
marked
View open source insights on deps.dev
Purl
pkg:npm/marked

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.0.10

Ecosystem specific 

{
    "affected_functions": [
        "(marked).parse"
    ]
}